<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <meta http-equiv="X-UA-Compatible" content="ie=edge">
    <title>作业1</title>
    <script type="text/javascript" src="A.js"></script>
</head>
<body>
    <script type="text/javascript">
        //实训1
        var date = getDay();
        document.writeln(date);
        //实训2
        var time = getTime();
        document.writeln(time);
        //实训3
        var sld = optional();
        document.writeln(sld);
        //实训4
        var abc = change();
        document.writeln(abc);        
        //实训5
        var dga = convert();
        document.writeln(dga);
    </script>
</body>
</html>